radioactivity

RADON gas. What is it?

Radon (Rn) is the colorless, odorless and tasteless radioactive gas that rises from the surface of the earth from geological uranium (U) formations all over the world, so we can discover a lot of houses and buildings, not only in Italy and in Sardinia, having a dangerous concentration of Rn.

Indoor radon gas can be tested in buildings because of its movement from inside the earth through cracks in the foundation, through drains and sump pumps, through water from wells and even directly through solid concrete walls, especially in volcanic areas.

Uranium is a heavy element discovered in 1789; it’s radioactive and it’s the father of Radon gas.

Radon gas has been discovered in 1900 by the German physicist Friedrich Ernst Dorn.

The atomic number of Radon gas is 86 (Z = 86).

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Actionable concentrations of radon activity recommended by different Organizations and States (*)

The radon concentration is measured in Becquerel per cubic meter (Bq/m³) in the International System of Units or in Picocuries per liter (pCi/L).

What is the actionable concentration of radon activity recommended by different International Organizations and States?

World Health Organization (WHO)

100 Bq/m³

2.7 pCi/L

European Union (EU)

200 Bq/m³ (new constructions, after 1990)

400 Bq/m³ (old buildings, until 1990)

Italy (I)

500 Bq/m³ (valid in a lot of workplaces, italian law D.Lgs. 230/1995)

400 Bq/m³ (italian law about natural radioactive radiation in workplaces, D.Lgs. 230/1995)

Environmental Protection Agency (USA)

150 Bq/m³

4.0 pCi/L

Health Canada

200 Bq/m³

5.4 pCi/L

United Kingdom (UK)

200 Bq/m³

5.4 pCi/L

Dott. Ing. Andrea Alessandro MUNTONI

(*) Under permission of RADON FREE – Web Log.

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